<a href=http://onlineslangdictionary.com/meaning-definition-of/ragtop>ragtop</a> To link to this term in a wiki such as Wikipedia, insert the following. [http://onlineslangdictionary.com/meaning-definition-of/ragtop ragtop] Some wikis use a different format for links, so be sure to check the documentation.
Talc (1), the softest mineral on the Mohs scale has a hardness greater than gypsum (2) in the direction that is perpendicular to the cleavage. Diamonds (10) also show a variation in hardness (the octahedral faces are harder than the cube faces).
The mineral talc is very soft and has a hardness of 1. Dia-mond is the hardest known mineral and has a hardness of 10. Your fingernail has a hardness of 2Â½, so any mineral that you can scratch has a hardness less than 2Â½, and any mineral that scratches your finger-nail has a har dness greater than 2Â½.